MESON Chess Problem Database

Problem Display
PID: 231390 (8/8/8/4p3/4P3/8/2QpkBBK/8 w - - 0 1)

Pikler, Robert

Pesti Naplo, 1927

8/8/8/4p3/4P3/8/2QpkBBK/8

#2

5 + 3

5454 Near Snap 2021
6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf2
      • 2.Qxd2#
  • Tries
    • 1.Be1?
      • threat
        • 2.Qxd2#
      • 1...Ke3
        • 2.Qxd2#
      • 1...Kxe1!
    • 1.Be3?
      • threat
        • 2.Qxd2#
      • 1...Ke1
        • 2.Qxd2#
      • 1...Kxe3!
    • 1.Qb3?
      • threat
        • 2.Qf3#
      • 1...d1Q
        • 2.Qe3#
      • 1...d1S
        • 2.Qc2#
      • 1...d1B
        • 2.Qe3#
      • 1...d1R
        • 2.Qe3#
      • 1...Kxf2!
    • 1.Qb2?
      • 1...Kd1
        • 2.Bf3#
      • 1...Kxf2
        • 2.Qxd2#
      • 1...Kd3!
    • 1.Qc4+?
      • 1...Kd1
        • 2.Bf3#
      • 1...Kxf2!
    • 1.Qc5?
      • 1...Kd1
        • 2.Bf3#
      • 1...d1Q
        • 2.Qe3#
      • 1...d1S
        • 2.Qc2#
      • 1...d1B
        • 2.Qe3#
      • 1...d1R
        • 2.Qe3#
      • 1...Kd3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qf3#
      • 1...Kd1
        • 2.Bf3#
      • 1...Kxf2
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qe3#
      • 1...d1S
        • 2.Qc2#
      • 1...d1B
        • 2.Qe3#
      • 1...d1R
        • 2.Qe3#

Anticipated by 1987(1868), 214530(1879)

This anticipates 110540(1953), 39043(1987)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XB(B)::QAR2(A),XP(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XB(B)
    • Try
      • B(B);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XB(B)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAB1(A)
      • Vars
        • P(a);SBLOCK::QAR1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,XB(B)
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(C)
        • K(b);P-FLIGHT,XB(B)::QAR2(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::B(C)
      • Refutation
        • K(b);P-FLIGHT,XB(B)
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::B(C)
        • P(a);SBLOCK::QAR1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • QAB1(A)
    • Vars
      • K(b);S_FLIGHT::B(C)
      • K(b);P-FLIGHT,XB(B)::QAR2(A),XP(a)
      • P(a);SBLOCK::QAR1(A)
      • P(a);OGATEB::QAR2(A)
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